B737-700 first officer experiences a pressurization controller failure on the takeoff roll. Climbing...

Narrative:

On takeoff roll; above 100 KTS; pressurization controller failed and switched to alternate. Continued takeoff and applied QRH procedure when workload permitted. Passing 6;000 ft; altn controller failed and pressurization started to indicate below sea level. The captain again applied the QRH procedure while I flew the airplane and talked with ATC. I requested a level off at 8;000 ft and informed them of the possibility of a return to the departure airport. The decision was made to return and we landed without incident. As we taxied in; I contacted operations and they assigned us a gate and requested we contact dispatch since they were unaware of our return. Since I was flying and monitoring ATC; I did not hear all the coordinating the captain did. I assumed dispatch was contacted since an emergency was not declared. I feel as a crew; we handled the situation well.

Original NASA ASRS Text

Title: B737-700 First Officer experiences a pressurization controller failure on the takeoff roll. Climbing through 6;000 FT the alternate pressurization controller fails and cabin altitude is noted below sea level. Crew elects to return to departure airport.

Narrative: On takeoff roll; above 100 KTS; pressurization controller failed and switched to alternate. Continued takeoff and applied QRH procedure when workload permitted. Passing 6;000 FT; ALTN controller failed and pressurization started to indicate below sea level. The Captain again applied the QRH procedure while I flew the airplane and talked with ATC. I requested a level off at 8;000 FT and informed them of the possibility of a return to the departure airport. The decision was made to return and we landed without incident. As we taxied in; I contacted Operations and they assigned us a gate and requested we contact Dispatch since they were unaware of our return. Since I was flying and monitoring ATC; I did not hear all the coordinating the Captain did. I assumed Dispatch was contacted since an emergency was not declared. I feel as a Crew; we handled the situation well.

Data retrieved from NASA's ASRS site as of July 2013 and automatically converted to unabbreviated mixed upper/lowercase text. This report is for informational purposes with no guarantee of accuracy. See NASA's ASRS site for official report.

Attributes
ACN	1043414
Time
Date	201210
Local Time Of Day	1201-1800
Place
Locale Reference	ZZZ.Airport
State Reference	US
Aircraft 1
Make Model Name	B737-700
Operating Under FAR Part	Part 121
Flight Phase	Takeoff
Component
Aircraft Component	Pressurization Control System
Person 1
Function	First Officer Pilot Flying
Experience	Flight Crew Last 90 Days 136
Events
Anomaly	Aircraft Equipment Problem Critical

B737-700 first officer experiences a pressurization controller failure on the takeoff roll. Climbing through 6;000 ft the alternate pressurization controller fails and cabin altitude is noted below sea level. Crew elects to return to departure airport.